Warp-stop-motion apparatus



Patented Mar. 28, I899.

G O DRAPER WARP STOP MOTION APPARATUS.

(Applic'afion filed Oct. 14, 1898.)

Inc: an (Tor gang 1; A

1 IE STATES PATENT Erica.

GEORGE O. DRAPER, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP-STOP-MOTION APPARATUS.

SPECIFICATION forming part of Letters Patent No. 22,182, dated March 28, 1899.

Application filed October 14, 1898. Serial No. 693,476. (No model.)

To all whom it may concern:

Be it known that I, GEORGE O. DRAPER, of Hopedale, county of Worcester, State of Massachusetts, haveinvented an Improvement in VarpStop-lrlotion Apparatus, of which t-hv following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representinglike parts.

Thisinvention relates to warp-stop -motion mechanism of that type wherein the engagement and arrest of a normally-vibrating feeler by an abnormally-positioned detector operates to effect the stoppageautomatically of the loom or other apparatus with which the stop-motion mechanism cooperates.

In the described type of stop-motion mechanism the detectors while controlled by normal warp-threads are maintained inoperative, release of a detector by slackness or failure of its warp-th read permitting the detector to move into operative position relative to the feeler. In m y present invention the detectors have an angular or rotative movement from inoperative to operative position, and in connection with the detectors I have also provided cooperative means to prevent undue strain or twisting upon a detector when engaged by the feeler.

I have herein chosen to illustrate my invention as applied to a loom for weaving, assuch adaptation of my invention is of most general application; but itis to be understood that my invention is not restricted to such use.

Figure 1 is a longitudinal sectional view of a portion of a loom with one embodiment of my invention applied thereto, taken on the line 00 cc, Fig. 2. Fig. 2 is a partial rear elevation of the apparatus shown in Fig. 1. Fig. 3 is an enlarged detail of a portion of the mechanism shown in Fig. 1; and Fig. 4 is a perspective detail, enlarged, of the combineddetector stop and guide to be described.

The greater part of the loom mechanism proper is omitted in the drawings, forming no part of this invention; but the harnesses H, shipper-handle S, whip roll or bar 'W, and lease-rods L L may be and are of usual or well-known construction.

I have herein shown a series of warp-stopmotion controlling or actuating detectors d,

located back of the lease-rods, Fig. 1, and loosely mounted to rock or move angularly on a rod or bar m, extended across the loom and supported in suitable brackets M on the loom-frame A. Each detector is preferably made of thin sheet metal and of substantially triangularshape, having near one of the lower corners a circular aperture to receive loosely the rod m, the lower edge (1 of the detector being shown (see Fig. 3) as straight and substantially at right angles to the upright straight part d of the outer edge farthest from the support, the detector being mounted eccentrically or with the major part of its body at one side of the support. A warp-receiving eye or opening d is made in the detector near its outer edge and above the point of support, as clearly shown in Fig. 3.

When the warp-threads are normal-4'. e., intact and under proper tensionthe detectors are thereby controlled and maintained tipped up in full-line position, Figs. 1 and 3, so that the lower front corner of each detector is above the path of a feeler a shown as an angle-iron having a continuous edge turned toward the detectors, said feeler being attached to arms a of a rock-shaft a, mounted in suitable bearings in the brackets M, the

path of movement of the feeler being normally below the detectors. When a detector is released by slackness or failure of its warpthread, it turns or moves angularly by its weight into dotted-line position, Figs. 1 and 3,'thereby presenting its edge d to engage and arrest the feeler at its next inward swing, the point of engagement of detector and feeler being substantially opposite and radial to the support m, the latter thus serving at such time as a back-rest for the detector.

I prefer to positively limit the angular movement of a released detector, and for this purpose I have mounted a fixed stop below the series of detectors, herein shown as a fiat bar 15 set on edge and supported by the brackets M, the upper edge of the bar being quite deeply notched or saw-toothed, as at t, Fig. 4:, the'sides of the teeth being beveled or oppositely inclined and of such depth that when the lower edge 01 of a released detector rests in the bottom of a notch the teeth will extend up at each side of the detector for some distance. The stop t is located between the detector-support m and the path of the feeler and not only operates as astop to limit angular movement of a detector, but intermediately sustains the latter when in en= gagement with the feeler, as clearly shown in Fig. 3.

By beveling or-inclining the sides of the teeth t the lower edge of a released detector is surely and accurately guided into the bottom of a notch, and the teeth prevent twisting or bending of the detector.

I prefer to so arrange the various parts that the feeler when engaged by a detector will be radial to the detector-support and sub-,

stantially at right angles to the stopt and the upright edge (1 of the detector, as shown in dotted lines, Fig. 3, in order to effect the desired arrest of the feeler with a minimum of bending or twisting strain upon the detector.

Any other form of stop may be employed, if desired, to limit the angular movement of the detectors, and it may be otherwise located; but for the reasons h'ereinhefc re stated I prefer the form andlocation of stop herein shown.

Any suitable mechanism may be employed to effect the normal vibration of the feeler and to operate the stopping means for the apparatus, one convenient form being herein shown and which will be described briefly.

An arm a on the rock-shaft a and extended oppositely to the feeler has a pivotally-connected bent arm a provided with a hunter (6 and a toe a, cooperating with an edge cam D, preferably on the cam-shaft C, said hunter 0. being thus moved into and out of the path of one or more tappets fof a cam F, fast on the shaft 0. \Vhen the feeler is arrested, the bunter a is held up in the path of the tappets, engagement therewith swinging the arm a to the rear. Said arm is slotted at a to receive a stud d on a short lever d pivoted at its upper end at d to a link d hooked around the cam-shaft at d and jointed at its other end to an arm 6 of a rock-shaft e provided with a knock-off arm e for the shipper-lever. The lower end of the lever (Z and the arm 0 are connected by a rod 6 the joint 0 acting as the lever-fulcrum when the hunter a is acted upon by the tappet-cam F, the swing of the upper end of said lever moving the link (Z longitudinally to operate the knock-off arm and release the shipper-handle S. The feeler is swung toward the detectors by the weight of the arm a and its connected parts, the re- Verse or outward swing of the feeler being effected by the cam D.

I have shown herein an operative mechanism embodying one form of my invention without attempting to show the various forms or arrangements in which my invention may be embodied.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In an apparatus of the class described, a normally-vibratable feeler, stopping means operated by or through arrest of the feeler, and a series of angularly-movable detectors inoperative while controlled by normal warpthreads, slackness or failure of a warp-thread releasing its detector to engage and arrest the feeler, and a toothed stop to receive the lower edge of and support a released detector betweeutwoofits tines,theangularmovementof the detector being thereby limited and twisting prevented when engaged by the feeler.

2. In an apparatus of the class described, a normally-vibratable feeler, stopping means operated by or through arrest of the feeler,

and a series of angularly-movable detectors inoperative while controlled-by normal warpnorm ally-vibratable governing-feeler operative upon its arrest, a series of angularlymovable detectors controlled and maintained inoperative by direct engagement with normal warp-threads, slackness or failure of a thread releasing its detector to move its upright edge into the path of and arrest the feeler, a support upon which the detectors are pivotally and eccentrically mounted, and a guide-stop for and extended beneath said dotectors, to cooperate with the opposite faces and the lower edge of a released detector between its support and the point of engagement with the feeler.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE O. DRAIER.

\Vitn esses:

E. D. BANoRoFT, THEO. B. IIASELDEN. 

